In Men In Black (1997), K tells Edwards to come to the MiB building where he ends up with a few members from different branches of the military. They're all there to take a test to join the MiB. What ...

In Men in Black (1997), the neuralyzer devices employ a red flash.
A few years later, in Men in Black II (2002), the neuralyzers have apparently been upgraded or modified, and now use a blue flash.
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Before being inducted into MiB, K takes J into Jeebs' Pawn Shop. Jeebs calls him "Officer Edwards" (Knowing J's name)
Jeebs obviously knows J from his pre-MiB life. When J's history is erased do they ...